"1948. Centaur KV 48, Test # 402. Changing drivers during 10 hour test." One man is climbing onto the tractor, which is in front of the tractor test car, while another man hops off the opposite side of the tractor. Two load tractors are behind...

"Using Centaur as loading unit following test no. 402." Side view of the Centaur KV-48 tractor on the test track. Not clear why the front is lifted, but it might have been because the steering system didn't allow the Centaur to be towed since it...

Everyone knows the frustration of those unwanted telephone sales calls. But what if instead of a sales pitch, you heard an inspirational quote? From Omaha, Robyn Wisch reports on a new, artistic twist on telemarketing.

"Test #. 402. Cylinder Head." Close-up of cylinder head from Centaur KV-48. This head was removed from the engine as part of the engine inspection which was carried out during the first 60-some years of the test procedure. It was done to insure...

"Corbitt G-50 tractor during the belt test in old lab." Front view of Corbitt tractor. An RPM Counter dial is on a table in front of the tractor; A thermometer measures air temperature; a cable or hose is running from the tractor.